Asking about an old science fiction movie

This film is a variation of a science fiction film and a gangster film. The idea is ingenious and the story content is quite innovative. It's a pity that director Graham Baker's handling method is relatively general, and he failed to control the dramatic contradiction and exciting action atmosphere of the two leading actors, which made him fall short. The story is set in the future world of Los Angeles. At this time, 300,000 migrant workers have entered the United States and become one with the people of the earth. In order to find out the real murderer, Essex, the partner of Interpol, had to accept Francis, an alien policeman, as his new partner. In the process of tracing the truth, two different kinds of criminal police gradually eliminated their mutual distrust, and overcame the obstacles encountered in investigating cases of different races, and jointly dealt with the main suspect-Terrence Stamp, a malicious earth entrepreneur. The two policemen were played by James Caan and Mandy Pettinkin.

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